Leg won't bend right
This has to be subdivided to work. Add a subdivision-surface modifier to the object being rigged, and set the view and render to about 3-4. Also, this should be set to simple subdividing if you want the geometry to look the same. 

If it does not look the same, Ctrl+R in Edit Mode, and slide the loopcuts to the sides of the original geometry, this will fix your issue.